New Project 2011/2012 /2013/2014!!

[z1000puddin]

I had bit of an issue tonight with my 1075.
I was going to fit a new set of plugs and while taking out #2 plug, the threads seemed unusually tight.

It soon became apparent once I got the plug out that a helicoil had been previously been fitted and it had come out with the plug

I must be going blind not to have seen this while the head was off the bike

Now I will have to remove the head & get this sorted.

My question is guys, if it has been helicoiled before what are my options to fit another in the same hole ??

I have only ever used timeserts for plug thread repair in the past, but I would need to check if the hole is going to be okay to take a timesert.

Oh the F&&*j Joys

Stu

[Flying Tiger]

Hope you get it sorted Stu, and good luck comes your way!

[RALPHARAMA]

Timesert usually have a similar pilot drill to timeserts, so the chances are that you will need to fit a big sert. If you have a time sert tap, however, I would be inclined to run that in first and see if that will work instead. If you lather the timesert tap in grease and use it carefully, you might be able to perform the surgery without amputating the head Certainly worth a try!

[z1000puddin]

Thanks Si - I hope so to

Vduk,
I have just been googling the "BIG SERTS, So at least I know that a fix is possible, albeit it could prove expensive, if I cant "borrow" a kit & a insert.

I have seen the kits going for around £165 + £30 for 5 inserts

When I did my black zed plug hole with a timesert, I did take the head off.

I dont really think that the "grease" method is a viable option as if any of the swarf gets through into the combustion chamber, even the ally swarf could make a big mess. & the process does create a good bit of swarf. But you are right it can be done.....

This web page shows how "easily the grease method could be"

http://www.motorcycleclassics.com/mc-ho ... hread.aspx

I will need to do a bit of grovelling around the local engineering shops.

Will let ya know how I get on.

Stu

[Jay1969]

Jay,
The seat I got from one of the members on Z1OC "MONK" - I cant remember the make of the seat, but I believe it was made in the UK


Stu

Thanks Stu :)

[z1bman]

the normal cause for a helicoil to come out with the plug is that at some time the plug has been overtightened. there should be no need to remove the head to repair the thread. set that cylinder to tdc + spray brake cleaner in to the cylinder + then blow compressed air into the plug hole . turn the crank 1/4 turn so the tap doesn't touch the piston. re cut the thread + then vacuum out the swarf . i have done this many times + never had a problem

[z1000puddin]

the normal cause for a helicoil to come out with the plug is that at some time the plug has been overtightened. there should be no need to remove the head to repair the thread. set that cylinder to tdc + spray brake cleaner in to the cylinder + then blow compressed air into the plug hole . turn the crank 1/4 turn so the tap doesn't touch the piston. re cut the thread + then vacuum out the swarf . i have done this many times + never had a problem

Z1bman
I think I will give this option a try first -
I think it is all about taking my time & ensuring no "bits" get left in the combustion chamber.

Hopefully get to it this weekend

thanks for the guidance gents.

Stu

[z1000puddin]

After getting the # 2 plug hole sorted I have been twiddling my thumbs until I get the bike MOTd.

I knocked up a couple of number boards

Not sure if I like these.

Any thoughts on these gents (good or bad)



Stu

[ADRIAN H]

Has the sidecar got a steering wheel Oooops sorry, I can see its a lawn mower

[Z1parR]

Better without them Stu

[z1000puddin]

Has the sidecar got a steering wheel Oooops sorry, I can see its a lawn mower

Thanks Adrian

Crap photographer, it always the things in the back ground that you don't notice until after you take the bloody picture.

I think I will take them off & use them as frisbees

Stu

[Z1parR]

Too right you do have to be careful what's in the background , these pisstakers on here will always spot something

[z1000puddin]

Had the bike in for its MOT

Sailed through no ADVISORYS (not even a comment about the zorst)

Only down side is DVLA - As the bike has not been registered for such a long time, DVLA have had to write to the previous registered keeper to ask them to confirm in writing that it has in fact been legally sold !!!
ARSE

I spoke with DVLA today and they said that they would not issue my Reg docs until 02-05-2013 - bugger!!

This means that I cannot get the road tax until then.

I think I will still take it down to the Ace on the 28th, hopefully I wont get pulled with no road tax.

stu

[z1000puddin]

Got myself a new compression tester today and decided to test the 1075

Engine warm
Throttle wide open
#1 - 160 psi
#2 - 155 psi
#3 - 165 psi
#4 - 175 psi


Is 20 psi difference any cause for concern ?

I am not sure of the deviation & what it would be down to ??
valve clearances ?
Slight bore / piston ring variations ?

[Al]

Stu can you recall what order you did them in??
It can make a difference if there is fuel in the carbs at the start of the test.
Air being compressible and liquids not so, if it is running the same amount of fuel into each cylinder then the results are valid.
Try it again cold soonish, and see if the spread of values is the same.
Have a look at the mixture on the plugs and see if any are richer or weaker. Is there any correlation between comp pressure and apparent mixture strength?
Possibly number 4 richer and number two weaker. This is only relevant if the carbs have not been set up finally.

Youre comp ratios' span from 11.9:1 number 4 pot to 10.5:1 for number 2 pot.
Assuming atmospheric pressure mean as 14.7 psi you are compressing 14.7 lbs per square inch by between 11.9 and 10.5 times.

10.5 to 1 sounds plausible based on the kit suppliers quoted figures and 11.9 to 1 is possibly an anomaly caused by over fuel on the test or over oil to the rings on the test.
11.9:1 is too high for standard pump fuel you will need to use ultimate, V power or one of the other high octane variants or possible pinking will occur.

AL

I hear 10% difference between highest and lowest is ideal but i guess this assumes that all other things are equal which they seldom are.